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Product category: Microprocessors, Microcontrollers and DSPs
News Release from: Freescale Semiconductor
Edited by the Electronicstalk Editorial Team on 04 October 2002

Process enhancements to cut power
consumption

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The latest performance enhancement to Motorola's 0.18 and 0.35 micron SiGe:C heterojunction bipolar transistor in a BiCMOS process is expected to provide longer battery life.

The latest performance enhancement to Motorola's 0.18 and 0.35 micron SiGe:C heterojunction bipolar transistor in a BiCMOS process is expected to provide longer battery life, meaning longer talk times for portable products including cellular phones This enhancement was presented this week at the IEEE's bipolar/BiCMOS circuits and technology meeting

By optimising the way the transistor is built, power consumption may be reduced by a factor of four, and a 60% improvement in peak frequency performance may be obtained, in comparison with the existing process.

"Our full suite of passives along with RF/analogue MOS and optimised silicon germanium carbon are designed to enable new products while allowing current reduction in existing products", said Dr Vida Ilderem, director of RF/IF silicon technologies for Motorola.

"High integration and low cost make this technology very attractive for wireless handset applications".

Silicon germanium allows for the integration of multiple functions onto a single chip.

This optimised chip-making process helps to further conserve power consumption, while improving performance.

Motorola's process integrates a high performance HBT with CMOS analogue and digital functions on a single chip.

Because the development was done on existing technology platforms, designers can use the existing models, libraries and standard cell designs for the 0.18- and 0.35-micron BiCMOS processes.

Cutoff frequencies have been improved from 50 to 80GHz (0.35-micron BiCMOS) and 120GHz (0.18-micron BiCMOS) with a reduction in minimum noise figure from 0.9 to 0.3dB.

This performance has been realised through vertical and lateral scaling of the transistors.

"These significant improvements in power consumption and RF noise boost the capabilities of an already leadership technology", said Behrooz Abdi, vice president and general manager of Motorola's Radio Products Division.

"These are key metrics for the wireless mobile market.

They are intended to enable our existing and future customers to offer leadership products to the cellular, wireless LAN and GPS markets with unprecedented levels of integration".

Motorola has introduced several products using its first-generation 0.35-micron SiGe:C process including the RF portion of its i.250 Innovative Convergence wireless platform.

The 0.18-micron process was qualified in the first quarter of 2002, with products planned for early 2003.

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